I am 20 years of age and I had a synovial sarcoma on my right neck. It was around 5cms in size at the time of the surgery. I know synovial sarcomas on the neck are very rare so that adds to my ambiguity. I had a surgery for its excision last month and will be starting my radiation therapy this week. I also did a full body CT scan (PET CT) to see if it had spread elsewhere and it had not. I consulted a couple different doctors for different views and they all seem to suggest that radiation therapy would be enough. I am scared that by not performing Chemo I might be harming myself. Also I am experiencing some heaviness in breathing is it possible that it is due to lung metastatis? I've heard that name being thrown around a lot.